<?php
class ModelCatalogReview extends Model {		
	public function addReview($product_id, $data) {
		$this->db->query("
			INSERT INTO " . DB_PREFIX . "review 
			SET customer_id = '" . (int)$this->customer->getId() . "', 
				product_id = '" . (int)$product_id . "', 
				text = '" . $this->db->escape($data['text']) . "', 
				rating = '" . (int)$data['rating'] . "', date_added = NOW(),
				status = 1");
	}
		
	public function getReviewsByProductId($product_id, $start = 0, $limit = 20) {
		$query = $this->db->query("
			SELECT r.review_id, r.rating, r.text, 
				p.product_id, pd.name, p.price, p.image, r.date_added, r.customer_id 
			FROM " . DB_PREFIX . "review r LEFT JOIN " . DB_PREFIX . "product p 
				ON (r.product_id = p.product_id) LEFT JOIN " . DB_PREFIX . "product_description pd 
				ON (p.product_id = pd.product_id) 
			WHERE p.product_id = '" . (int)$product_id . "' AND p.date_available <= NOW() 
				AND p.status = '1' AND r.status = '1' 
				AND pd.language_id = '" . (int)$this->config->get('config_language_id') . "' 
			ORDER BY r.date_added DESC LIMIT " . (int)$start . "," . (int)$limit);
		
		return $query->rows;
	}
	
	public function getAverageRating($product_id) {
		$query = $this->db->query("SELECT AVG(rating) AS total FROM " . DB_PREFIX . "review WHERE status = '1' AND product_id = '" . (int)$product_id . "' GROUP BY product_id");
		
		if (isset($query->row['total'])) {
			return (int)$query->row['total'];
		} else {
			return 0;
		}
	}	
	
	public function getTotalReviews() {
		$query = $this->db->query("SELECT COUNT(*) AS total FROM " . DB_PREFIX . "review r LEFT JOIN " . DB_PREFIX . "product p ON (r.product_id = p.product_id) WHERE p.date_available <= NOW() AND p.status = '1' AND r.status = '1'");
		
		return $query->row['total'];
	}

	public function getTotalReviewsByProductId($product_id) {
		$query = $this->db->query("SELECT COUNT(*) AS total FROM " . DB_PREFIX . "review r LEFT JOIN " . DB_PREFIX . "product p ON (r.product_id = p.product_id) LEFT JOIN " . DB_PREFIX . "product_description pd ON (p.product_id = pd.product_id) WHERE p.product_id = '" . (int)$product_id . "' AND p.date_available <= NOW() AND p.status = '1' AND r.status = '1' AND pd.language_id = '" . (int)$this->config->get('config_language_id') . "'");
		
		return $query->row['total'];
	}
}
?>